package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entity.CommonResult;
import com.atguigu.springcloud.entity.Payment;
import com.atguigu.springcloud.lb.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@RestController
@Slf4j
public class OrderController {
    //单机版
//    public static final String PAYMENT_URL="http://127.0.0.1:8001";
    //集群版
    public static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";
    @Resource
    private RestTemplate restTemplate;
    @Resource
    private LoadBalancer loadBalancer;

    @Resource
    private DiscoveryClient discoveryClient;
    @PostMapping ("consumer/payment/create")
    public CommonResult<Payment> create(@RequestBody Payment payment){
        return restTemplate.postForObject(PAYMENT_URL+"/create",payment,CommonResult.class);
    }
    @GetMapping("consumer/payment/get/{id}")
    public CommonResult<Payment> getPaymentById(@PathVariable("id") long id) {
        return restTemplate.getForObject(PAYMENT_URL + "/getPaymentById/" + id, CommonResult.class);
    }
    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id)
    {
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);

        if(entity.getStatusCode().is2xxSuccessful()){
            return entity.getBody();//getForObject()
        }else{
            return new CommonResult<>(444,"操作失败");
        }
    }
    @GetMapping(value = "/consumer/payment/lb")
    public String getPaymentLB()
    {
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");

        if(instances == null || instances.size() <= 0){
            return null;
        }

        ServiceInstance serviceInstance = loadBalancer.instances(instances);
        URI uri = serviceInstance.getUri();

        return restTemplate.getForObject(uri+"/payment/lb",String.class);

    }


}
